function Get-EnvironmentVariable {
<#
.SYNOPSIS
    Get an environment variable. Will check the supplied store, or if no store supplied, checks all stores in order of process, user, machine.

.PARAMETER Name
    Gets the environment variable with the specified name.

.PARAMETER StoreName
    Checks the specified store name for the specified name.
    If not present, checks all stores in order of process, user, machine.
#>
    [CmdletBinding()]
    param(
        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [Alias("Key")]
        [string]$Name,
        [Parameter(Mandatory = $false)]
        [Alias("Store")]
        [Alias("Location")]
        [ValidateSet("Process","User","Machine","Any")]
        [string]$StoreName = "Any"
    )

    $logLead = Get-LogLeadName

    Write-Verbose "$logLead : Get environment variable [$Name] from $StoreName store"

    # Can't combine the three below like we do in Set- and Remove- so we can do the Any fallback

    if (($StoreName -eq "Any") -or ($StoreName -eq "Process")) {
        $var = [System.Environment]::GetEnvironmentVariable($Name, [system.EnvironmentVariableTarget]::Process)
        if ($null -ne $var) {
            Write-Verbose "$logLead : Found EnvironmentVariable in the Process store"
            return $var
        }
    }

    if (($StoreName -eq "Any") -or ($StoreName -eq "User")) {
        $var = [System.Environment]::GetEnvironmentVariable($Name, [system.EnvironmentVariableTarget]::User)
        if ($null -ne $var) {
            Write-Verbose "$logLead : Found EnvironmentVariable in the User store"
            return $var
        }
    }

    if (($StoreName -eq "Any") -or ($StoreName -eq "Machine")) {
        $var = [System.Environment]::GetEnvironmentVariable($Name, [system.EnvironmentVariableTarget]::Machine)
        if ($null -ne $var) {
            Write-Verbose "$logLead : Found EnvironmentVariable in the Machine store"
            return $var
        }
    }

    # We should not support dotted notation but we do because why not
    # Typically we expect environment variables to use underscores. We should converge on that.
    if ($Name.IndexOf('.') -gt -1) {
        $underscoredName = $Name.Replace('.', '_')
        Write-Verbose "$logLead : Value was not present dotted, will check with underscores for [$underscoredName]"

        return Get-EnvironmentVariable -Name $underscoredName -StoreName $StoreName
    }

    Write-Verbose "$logLead : Could not find the key [$Name] in $StoreName store, returning `$null"
    return $null
}